Math
posted by Keisha .
If in the set A, 3x4 and B 2x+5, with X is an intersect between the two sets, how do i find for x?? I already know the ans is 9, but need help with the working.
Do i just bring the 4 over to 5 and change the sign then add.

I am confused by your mention of "sets". I think A and B as the equations for straight lines.
If 3x 4 = 2x +5, then x = 9
That somes from setting the two equations equal to each other and solving for x
Respond to this Question
Similar Questions

Sets
A is a set of all letters in the alphabet and B is a set of vowels in the alphabet. What kind of relationship exists between the two sets? 
Math
The question is on sets not solving for a straight line, the info on A is in one circle and B in the other circle, X is the intersection between both circles and i still don't have the working, even though i know the ans is 9 i need … 
Algebra
Observe the following sets and answer he quesions given below. A = The set of all residens in Mumbai. B = he set of all residens in Bhopal. C = he sets of all residents in Maharashtra. D = The sets of all residents in India. E = The … 
CALCULUS ONE!
The graph of sinx and cosx intersect once between 0 and pi/2. What is the angle between the two curves at the point where they intersect? 
PreAlgebra
Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets of values. My Answer: B) two … 
math
U is the set of positive integers less than or equal to 30. A is the set of natural numbers that are multiples of 5 in U. B is the subset of all of the even integers in U. a) Find n(A U B) b) Find n(A intersect B) c) Find n(A U B' … 
math
U is the set of positive integers less than or equal to 30. A is the set of natural numbers that are multiples of 5 in U. B is the subset of all of the even integers in U. a) Find n(A U B) b) Find n(A intersect B) c) Find n(A U B' … 
PreAlgebra
Scatter plots are used to look for a pattern of association, or trend, between one set of values two sets of values three sets of values four sets of values My answer: two sets of values 
Precalculus
I know I posted this question already ,but I posted the wrong one.... Sets A,B and C are subsets of U. U= positive integers less than 16 A= prime numbers B= factors of 36 C= multiples of 4 (A intersect B)' INTERSECT C {? 
Math
6. The boxandwhisker plot below shows the numbers of text messages received in one day by students in he seventh and eighth grades at Lincoln Middle School. a) Describe the overlap of the two sets of data. b) Find the IQR of each …